Composition of matter for silverplating metals



Patented Apr. IQ, 1923.

warren starts LINDOLPH MINORSHEROW, OF OSS'INING, NEW YORK.

ooivrrosrrron or MATTER r03 SILVERIPLATING METALS.

N0 Drawing.

T 0 all whom it may concern:

Be it known that I, LINDOLPH MiNoR SHE- now, a citizen of the United States, and residing at Ossining, in the county of "Westchester and State of New York, have invented a certain new and usefulComposition of Matter for Silver-plating Metals, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to compositions of matter and particularly to a silver plating solution, paste or powdered substance adapted to be applied to a piece of metal for giv- -ing such metal asilver plating or coating; and the object'of the invention is to provide a composition of the class specified which will polish the metal surface to which it is applied and also form a silver plating or coating theron; and with this and other objects in view the invention consists in a combination of the class and for thepurpose specified 'made in the manner hereinafter described and claimed.

In carrying: my invention into effect, I employ the following ingredients which are combined in the manner hereinafter set out.

Pure silver metal,

Nitric acid,

Camphor gum,

Peroxide of hydrogen solution (or double distilled water),

Sodium cyanide,

Paris white,

Oil of mirbane.

In practise camphor gum is dissolved in peroxide of hydrogen solution, or in water, to such an extent that the peroxide of hydrogen solution or water will take up the camphor to make a camphorated peroxide or water solution.

In making up a quantity of this substance I take four hundred and eighty grains of the silver crystal (silver nitrate) and dissolve the same in two quarts of the camphorated peroxide solution, this is done in one vessel or vat and in another vessel or vat, I dissolve one and one-quarter pounds of sodium cyanide in eight quarts of the camphorated peroxide or water solution. When both of these solutions are thoroughly mingled and dissolved I pour the first named or silver solution into the second named or sodium cyanide solution thoroughly stirring or agitating the solutions during this operation, after which ten pounds of Paris white into which Application filed June 6, 1922.

Serial No. 566,411

two teaspoonsful of oil of mirbane have beenabsorbed is stirred into the solution toform my improved silver plating or coating solution.

A solution made in themanner above set out if applied to a rag or the like and rubbed upon a pieceof metal to be cleaned and plated, the solution will first clean the surface, if cleaning be necessary, after which it will leave a platingor coating of silver on such surface. One application of the solution will be all that is necessary, but if more than one application is used a stronger plating or coating will be produced. In the use of my improved product, it is necessary to agitate orshake the solution immediately before using as a deposit will be present in the bottom of the container in which thesolution is placed.

My improved cleaning and plating solution maybe put 'upin a small flask at a comparatively reasonable price and will apply a plating or-coating of silver to a metal surface whichwill remain bright and of a silvery appearance for a: considerable length of time without tarnishing or discoloring.

My improved solution is designed particu larly for use in plating various ornamet'al, decorative =01'finished inetalware, but may also be used in plating silver flat-ware, in cluding forks, knives, spoons and the like, if desired, and. particularly in plating silverplated ware and will operate to materially lengthen the life of plated ware of this class.

My improved composition may also be made up in the form of a paste-like substance by simply allowing the water or peroxide of hydrogen solution to evaporate or partially evaporate, and this paste-like substance may be put up in jars or other containers and may be applied with a damp cloth as will be apparent.

I may also make up my improved product in the form of a powder in which event the silver nitrate in a crystal form is ground into a powder as is also camphor gum and sodium cyanide, and these products are mingled with Paris white in the proportions above named, to form a powdered substance which may be rubbed onto a piece of metal to be plated, but preferably by the use of a damp cloth.

It will be understood that I am not necessarily limited to the specific proportions of the various ingredients herein described,

nor am I necessarily limited to the specific ingredients herein set out, as any other ingredients having the same active properties may be substituted for those named, as for example, any suitable scented oil may be employed Without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention What I claim as new and desire to secure by Letters Patent, is 1- l. A composition of the class described containing silver nitrate, camphor, a cyanide solution and whiting.

'2. A composition of the class described containing silver nitrate, camphor, sodium cyanide and Paris White.

3. A composition of the class described containing silver nitrate, camphorated Water, sodium cyanide, Paris white and a perfumed oil.

4:. A silver plating solution of the class described composed of pure silver metal dissolved in silver nitrate, camphor gum dissolved in Water, sodium cyanide and Paris White.

5. A silver plating solution of the class described composed of pure silver metal dissolved in silver nitrate, camphor gum dissolved in Water, sodium cyanide, Paris white and an oil of mirbane.

6. A silver plating solution of the class described made from a solution of camphorated water and silver nitrate, and a solution of sodium cyanide and camphorated water andto the combined solutions is added Paris White.

7. A silver plating solution of the class described made from a solution of camphorated Water and silver nltrate, a solution oi sodium cyanide and camphorated Water and to the combined solutions is added Paris white and a suitable perfuming oil.

8. A silver plating solution of the class described containing in proportion four hundred and eighty grains of silver nitrate, eight quarts of camphorated water, one and one-quarter pounds of sodium cyanide, ten pounds of Paris White and two teaspoonsful of oil of mirbane.

9. A composition of the class described, containing silver nitrate, camphor, Water sodium cyanide and Whiting.

10. A silver plating solution of the class described, containing 111 proportions, approximately four-hundred and eighty grains of silver nitrate, eight quarts of camphorated water, one and one-quarter pounds of sodium cyanide and ten pounds of Paris White.

11. A silver plating solution of the class described, containing in proportions, approximately four-hundred and eight grams of silver nitrate, eight quarts of camphorated LINDOLPH MINOR SHERO'W.

Witnesses THOMAS G. BARNES,

G. S. PURDY. 

